Richard W. Campbell

📍 Evansville, IN: #7 of 47 inventorsTop 15%

🗺 Indiana: #496 of 1,942 inventorsTop 30%

Overall (1997): #89,458 of 185,788Top 50%

Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
D388571	Combined floor scraper and scrubber	—	1997-12-30